1 ! Copyright (C) 2018 John Benediktsson
2 ! See http://factorcode.org/license.txt for BSD license
4 USING: arrays combinators io io.binary.fast io.encodings.binary
5 io.files kernel math sequences ;
14 : read-double ( -- n )
15 8 read le> bits>double ;
18 4 [ read-double ] replicate ;
20 : read-int-array ( n -- parts )
21 [ read-int ] replicate ;
23 : read-range ( -- range )
24 read-double read-double 2array ;
26 : read-double-array ( n -- array )
27 [ read-double ] replicate ;
31 TUPLE: header file-code file-length version shape-type x-min
32 y-min x-max y-max z-min z-max m-min m-max ;
34 : read-header ( -- header )
35 4 read be> dup 9994 assert= ! file code
37 4 read be> ! file-length
38 read-int dup 1000 assert= ! version
52 : read-point ( -- point )
53 read-double read-double point boa ;
55 : read-points ( n -- points )
56 [ read-point ] replicate ;
58 TUPLE: multipoint box points ;
60 : read-multipoint ( -- multipoint )
61 read-box read-int [ read-point ] replicate multipoint boa ;
63 TUPLE: polyline box parts points ;
65 : read-polyline ( -- polyline )
66 read-box read-int read-int
67 [ [ read-int ] replicate ]
68 [ [ read-point ] replicate ] bi*
71 TUPLE: polygon box parts points ;
73 : read-polygon ( -- polygon )
74 read-box read-int read-int
75 [ read-int-array ] [ read-points ] bi*
78 TUPLE: point-m x y m ;
80 : read-point-m ( -- point-m )
81 read-double read-double read-double point-m boa ;
83 TUPLE: multipoint-m box points m-range m-array ;
85 : read-multipoint-m ( -- multipoint-m )
87 [ read-points read-range ] [ read-double-array ] bi
90 TUPLE: polyline-m box parts points m-range m-array ;
92 : read-polyline-m ( -- polyline-m )
93 read-box read-int read-int [ read-int-array ] dip
94 [ read-points read-range ] [ read-double-array ] bi
97 TUPLE: polygon-m box parts points m-range m-array ;
99 : read-polygon-m ( -- polyline-m )
100 read-box read-int read-int [ read-int-array ] dip
101 [ read-points read-range ] [ read-double-array ] bi
104 TUPLE: point-z x y z m ;
106 : read-point-z ( -- point-z )
107 read-double read-double read-double read-double point-z boa ;
109 TUPLE: multipoint-z box points z-range z-array m-range m-array ;
111 : read-multipoint-z ( -- multipoint-z )
113 [ read-points read-range ]
114 [ read-double-array read-range ]
115 [ read-double-array ] tri multipoint-z boa ;
117 TUPLE: polyline-z box parts points z-range z-array m-range
120 : read-polyline-z ( -- polyline-z )
121 read-box read-int read-int [ read-int-array ] dip
122 [ read-points read-range ]
123 [ read-double-array read-range ]
124 [ read-double-array ] tri polyline-z boa ;
126 TUPLE: polygon-z box parts points z-range z-array m-range
129 : read-polygon-z ( -- polyline-z )
130 read-box read-int read-int [ read-int-array ] dip
131 [ read-points read-range ]
132 [ read-double-array read-range ]
133 [ read-double-array ] tri polygon-z boa ;
135 TUPLE: multipatch box parts points part-types z-range z-array
138 : read-multipatch ( -- multipatch )
139 read-box read-int read-int
140 [ [ read-int-array ] [ read-int-array ] bi ] dip
141 [ read-points read-range ]
142 [ read-double-array read-range ]
143 [ read-double-array ] tri multipatch boa ;
145 : read-shape ( -- shape )
149 { 3 [ read-polyline ] }
150 { 5 [ read-polygon ] }
151 { 8 [ read-multipoint ] }
152 { 11 [ read-point-z ] }
153 { 13 [ read-polyline-z ] }
154 { 15 [ read-polygon-z ] }
155 { 18 [ read-multipoint-z ] }
156 { 21 [ read-point-m ] }
157 { 23 [ read-polyline-m ] }
158 { 25 [ read-polygon-m ] }
159 { 28 [ read-multipoint-m ] }
160 { 31 [ read-multipatch ] }
163 TUPLE: record number content-length shape ;
165 : read-record ( -- record/f )
166 4 read [ be> 4 read be> read-shape record boa ] [ f ] if* ;
168 : read-records ( -- records )
169 [ read-record dup ] [ ] produce nip ;
171 : read-shp ( -- header shapes )
172 read-header read-records ;
174 : file>shp ( path -- header shapes )
175 binary [ read-shp ] with-file-reader ;
177 TUPLE: index offset content-length ;
179 : read-index ( -- index/f )
180 4 read [ be> 4 read be> index boa ] [ f ] if* ;
182 : read-indices ( -- indices )
183 [ read-index dup ] [ ] produce nip ;
185 : read-shx ( -- header indices )
186 read-header read-indices ;
188 : file>shx ( path -- header indices )
189 binary [ read-shx ] with-file-reader ;